Portable gas grill



FIG. 1 is a front perspective view of a portable gas grill showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a side view opposite FIG. 4.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portable gas grill, as shown and described. 